In the 2011 Census the population of Bilambil Heights is 3,278, 50.8% female and 49.2% male.

The median/average age of the Bilambil Heights population is 39 years of age, 2 years above the Australian average.

79.2% of people living in Bilambil Heights were born in Australia. The other top responses for country of birth were England 5.7%, New Zealand 4.1%, Germany 0.8%, Scotland 0.7%, United States of America 0.5%, 11% other countries.

93.7% of people speak English as their first language 0.7% German, 0.3% French, 0.3% Italian, 0.3% Spanish, 0.2% Japanese, 1.8% other languages.